Where to find optimized metahuman .dna file?

How can I retrieve the .dna file when downloading an optimized metahuman for 5.5? or is it not possible.

I want to be able to run a script on it with dnacalib.

I see in the head SKM that there is a metahuman DNA data asset under ‘asset user data’, but that points to a C++ asset within the project folder, not a .dna source asset in explorer.

Thanks,
Markus